ATI LPN
Medical Surgical Nursing Neurological Disorders Quizlet Questions
Question 1 of 5
Once an action potential is triggered, there is a
Correct Answer: A
Rationale: During an action potential, Na⁺ influx causes depolarization, reversing the membrane potential to positive inside (~+30 mV), followed by K⁺ efflux to repolarize.
Question 2 of 5
When you are very nervous, perhaps before you must speak in front of your college class, you notice that your mouth is dry and your heart is racing. This is most likely due to stimulation by the
Correct Answer: B
Rationale: Sympathetic activation (fight or flight) causes dry mouth (reduced salivation) and racing heart, preparing the body for stress.
Question 3 of 5
During REM sleep, an EEG shows
Correct Answer: D
Rationale: REM sleep features rapid, irregular EEG patterns similar to wakefulness, reflecting active brain states like dreaming.
Question 4 of 5
The cerebellum, portion of the brain, is located below the occipital lobes of the cerebrum.
Correct Answer: B
Rationale: The cerebellum is the second largest brain region after the cerebrum, located below the occipital lobes, involved in coordination.
Question 5 of 5
Impulse conduction is fastest in neurons that are:
Correct Answer: A
Rationale: Myelinated neurons conduct impulses faster via saltatory conduction, where the signal jumps between nodes of Ranvier.